/ Dictionary / Index E erasion: Meaning and Definition of Find definitions for: e•ra•sion Pronunciation: (i-rā'zhun, -shun), [key] — n. the act of erasing. the scraping away of tissue, esp. of bone. Also calledarthrectomy.excision of a joint. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. erasing head Erasistratus Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language